Prison farm
A prison farm (also known as a penal farm) is a large correctional facility where penal labor convicts work — legally or illegally — on a farm (in the wide sense of a productive unit), usually for manual labor, largely in the open air, such as in agriculture, logging, quarrying, and mining. In the United States, such forced labor is made legal by the thirteenth amendment to the Constitution; however, some other parts of the world have made penal labor illegal.